Proton Nuclear Magnetic Resonance Study in Manganese Formate Dihydrate
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概要
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Proton NMR in single crystals of Mn (HCOO)_2.2H_2O has been observed at the temperature region from 2.5°K to 300°K. The shift of the resonance lines is explained by a dipole sum carried out by the use of atomic parameters presumed from those of the isomorphous magnesium formate. The results give a good agreement with the experimental data obtained above 4.2°K, if the magnetic moments of two kinds of manganese ions in the crystal are assumed to be ciH/(T+Θ) for those of the one kind and to be ciH/T for the other, where ci is g^2β^2S(S+1)/3k, g=2.00, S=5/2, and Θis 9.4±0.7°K. Since an abrupt shift of the NMR lines occurs at 3.70±0.05°K, a magnetic transition is thought to exist at this temperature. It is presumably due to a sort of magnetic ordering in the one set of ions which is found to have an antiferromagnetic temperature dependence. At this temperature, a change in ESR spectrum and a sharp peak in the susceptibllity are also found. Below this temperature, one of the NMR lines has a zero field shift and shows an angular dependence remarkably distorted from a sinusoidal variation.
- 社団法人日本物理学会の論文
- 1964-10-05
著者
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MATSUURA Motohiro
Department of Physics, Faculty of Science, Kyoto University
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ABE Hidetaro
The Institute for Solid State Physics,The University of Tokyo
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Abe Hidetaro
The Institute For Solid State Physics The University Of Tokyo
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Matsuura Motohiro
Department Of Physics Faculity Of Science Kyoto University
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Matsuura Motohiro
Department Of Electronics And Information Science Kyoto Institute Of Technology
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Abe Hidetaro
The Institute For Solid Stae Physics The University Of Tokyo
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MATSUURA Motohiro
Department of Agricultural Chemistry, Kyoto University
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